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Pointer to a Structure to pass to a C function

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Let me preface this by I am very new to python programming...
I was looking at an old discussion about this that basically showed how to create a pointer to a structure to send to a C function in a DLL, it was...
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  1. from ctypes import *
  3. class STUDENT(Structure):
  4.     _fields_ = [('name', c_int), ('id', c_int), ('addition', c_ubyte)]
  5.     buffer = (c_byte * 1024)()
  6.     buffer_p = pointer(buffer)
  7.     student_p = cast(buffer_p, POINTER(STUDENT))
My questions are about the line of code:
"buffer = (c_byte * 1024)()"

1) Is the purpose of the 1024 simply to allocate enough bytes to hold the structure?

2) If so, should there a better way to allocate a buffer of the correct size?
Dec 16 '13 #1
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